Here are some of the latest health and medical news developments, compiled by the editors of HealthDay:

Tighter Fuel Economy Rules to be Scrapped by Trump Administration

New federal fuel economy rules for cars and trucks will be rolled back by the Trump administration, according to the Associated Press.

The requirements would have forced car manufacturers to significantly increase the fuel efficiency of new vehicles and were a major part of former President Barack Obama's plan to fight climate change.

Automakers urged the Trump administration to scrap the new regulations and an Environmental Protection Agency announcement about the matter could come as early as this week, the AP reported.

However, the federal government could face a legal fight from California and other states that have enacted their own tight standards.

Four more people with E. coli O157:H7 infections linked to I.M. Healthy Brand SoyNut Butter have been reported, bringing the total to 16 patients in nine states, the U.S. Centers for Disease Control and Prevention says.

Most of the patients are children, including all five who developed kidney failure.

On March 7, the SoyNut Butter Company recalled all varieties of I.M. Healthy SoyNut Butters and I.M. Healthy granola products.

Consumers should not eat, and childcare centers, schools, and other institutions should not serve, any I.M. Healthy brand SoyNut Butter or I.M. Healthy brand granola coated with SoyNut Butter, the CDC said.

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George Michael Died of Natural Causes

U.K. pop singer George Michael died of natural causes, a coroner says.

Michael died of problems related to his heart and liver, according to Darren Salter, the senior coroner for Oxfordshire, NBC News reported.

The 53-year-old singer died at home on Dec. 25, 2016.

Before the coroner's announcement, British police had labeled Michael's death unexplained, but not suspicious, NBC News reported.